It is explained that the fact that he (peace and blessings be upon him) is the Seal of the Prophets necessitates that he is the Seal of the Messengers.
Machine translationRead the Arabic original
The Shaykh : Does the fact that he is the Seal of the Prophets necessitate that he is the Seal of the Messengers? The question is yours. Does it not necessitate it? Rest. It does necessitate it. What is the basis for that?
The student: ... .
The Shaykh : Ah.
The student: ... .
The Shaykh : Yes, complete. That is to say, if he is the Seal of the Prophets, it necessitates that he is the Seal of the Messengers, because there is no messenger who is not a prophet, and the reverse is not the case.
The student: ... .
The Shaykh : Ah.
The student: ... .
The Shaykh : Yes, complete. That is to say, if he is the Seal of the Prophets, it necessitates that he is the Seal of the Messengers, because there is no messenger who is not a prophet, and the reverse is not the case.